Alzheimer’s disease may have changed a lot of things in the life of Country Music Hall of Famer Glen Campbell, but his ability to create sounds that still resonate in our shared memory is virtually untouched. Campbell, 75, gave his first performance Friday night at the IP Casino in Biloxi, Miss., since announcing he has Alzheimer’s, the degenerative brain disease that’s slowly robbing him of his memories and abilities. His family and road crew were worried he might be rusty after a long layoff since his last performance, but the night was largely a triumph. Except for a few flubbed lyrics, quickly corrected with the help of teleprompters, Campbell and his band powered through a tight 22-song set that included “By the Time I Get to Phoenix,” “Gentle on my Mind,” “Wichita Lineman” and “Southern Nights,” interspersed with self-deprecating jokes. “I tell you I’m happy to be here,” Campbell said. “At my age I’m happy to be anywhere. It seems like I’ve been doing this since Hitler was a corporal.” … His “Office” character Michael Scott may be utterly clueless, but Steve Carell knows a thing or two. And when it comes to his sixth shot at the best actor Emmy, Carell jokes that he’s got this one in the bag. “Of course, what could possibly go wrong? How could I lose?” the 48-year-old said with a laugh. Carell’s latest nomination was for his final season on the hit NBC comedy. Carell says he’ll be attending this year’s awards on Sept. 18 with low expectations and no regrets. Carell stars alongside Ryan Gosling, Julianne Moore and Emma Stone in the upcoming romantic comedy “Crazy, Stupid, Love,” which opens July 29.